5.6.165 - Distance by trigonometric parallax

Understand how astronomical distances can be determined using trigonometric parallax.

Use - distance by trigonometric parallax to connect the rule to the data and decision in the question.

This matters because - distance by trigonometric parallax determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - distance by trigonometric parallax to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Distance by trigonometric parallax is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.